Temperature dependence of spin-orbit torques in W/CoFeB bilayers

Witold Skowroński; Monika Cecot; Jarosław Kanak; Sławomir Ziȩtek; Tomasz Stobiecki; Lide Yao; Sebastiaan Van Dijken; Takayuki Nozaki; Kay Yakushiji; Shinji Yuasa

doi:10.1063/1.4960793

Temperature dependence of spin-orbit torques in W/CoFeB bilayers

Witold Skowroński, Monika Cecot, Jarosław Kanak, Sławomir Ziȩtek, Tomasz Stobiecki, Lide Yao, Sebastiaan Van Dijken, Takayuki Nozaki, Kay Yakushiji, Shinji Yuasa

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Abstract

We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.

Original language	English
Article number	062407
Pages (from-to)	1-4
Journal	Applied Physics Letters
Volume	109
Issue number	6
DOIs	https://doi.org/10.1063/1.4960793
Publication status	Published - 8 Aug 2016
MoE publication type	A1 Journal article-refereed

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title = "Temperature dependence of spin-orbit torques in W/CoFeB bilayers",

abstract = "We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.",

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AU - Skowroński, Witold

AU - Cecot, Monika

AU - Kanak, Jarosław

AU - Ziȩtek, Sławomir

AU - Stobiecki, Tomasz

AU - Yao, Lide

AU - Van Dijken, Sebastiaan

AU - Nozaki, Takayuki

AU - Yakushiji, Kay

AU - Yuasa, Shinji

N1 - | openaire: EC/FP7/307502/EU//E-CONTROL

PY - 2016/8/8

Y1 - 2016/8/8

N2 - We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.

AB - We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.

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JF - Applied Physics Letters

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Temperature dependence of spin-orbit torques in W/CoFeB bilayers

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Temperature dependence of spin-orbit torques in W/CoFeB bilayers

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